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    Crosslinked polymer composition, power cable insulation and power cable
    21.
    发明授权
    Crosslinked polymer composition, power cable insulation and power cable 有权

    公开(公告)号：US10221300B2

    公开(公告)日：2019-03-05

    申请号：US15105238

    申请日：2014-08-19

    Applicant: BOREALIS AG

    Inventor： Per-Ola Hagstrand ,  Villgot Englund ,  Annika Smedberg ,  Andreas Farkas ,  Carl-Olof Olsson

    IPC: C08K5/375 ,  C08K5/14 ,  C08K5/01 ,  H01B3/44

    Abstract: The present invention relates to a crosslinked polymer composition, which is obtained by crosslinking a polymer composition, which polymer composition has a melt flow rate (MFR) of at least 1.7 and comprises a polyolefin, peroxide and sulphur containing antioxidant, characterized by that the crosslinked polymer composition has an Oxidation Induction Time, determined according to ASTM-D3895, ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC), which Oxidation Induction Time corresponds to Z minutes, and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC, wherein Z1≤Z≤Z2, W1≤W≤W2, and W≤p−270*Z, wherein Z1 is 0, Z2 is 60, W1 is 0 and W2 is 9500, and p is 18500; and use thereof, a power cable insulation and a power cable, useful in high voltage (HV) and extra high voltage (EHV) cable applications direct current (DC) applications.

    Polyethylene with a high vinyl content and beneficial rheological properties
    23.
    发明授权
    Polyethylene with a high vinyl content and beneficial rheological properties 有权

    公开(公告)号：US12234308B2

    公开(公告)日：2025-02-25

    申请号：US16770707

    申请日：2018-12-18

    Applicant: BOREALIS AG

    Inventor： Annika Smedberg ,  Villgot Englund ,  Emil Hjärtfors

    IPC: C08F210/18 ,  C08L23/06 ,  H01B3/44

    Abstract: The invention relates to a polyethylene which contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B1≤B, wherein B1 is 0.30; and has a complex viscosity (η*) at 0.05 rad/sec, which is X Pas, and X1≤X≤X2, wherein X1 is 10000 and X2 is 30000; and has a complex viscosity (η*) at 300 rad/sec, which is Y Pas, and Y1≤Y≤Y2, wherein Y1 is 5 and Y2 is 350, both complex viscosities (η*) are determined according to method ISO 6721-1 on stabilised samples of the polyethylene, a polymer composition, an article being e.g. a cable, e.g. a power cable, and processes for producing a polyethylene, a polymer composition and an article, and an article; useful in different end applications, such as wire and cable (W&C) applications.

    Polymer composition for cable applications with advantageous electrical properties
    28.
    发明授权
    Polymer composition for cable applications with advantageous electrical properties 有权

    公开(公告)号：US10934420B2

    公开(公告)日：2021-03-02

    申请号：US15522725

    申请日：2015-10-27

    Applicant: BOREALIS AG

    Inventor： Villgot Englund ,  Per-Ola Hagstrand ,  Annika Smedberg ,  Ulf Nilsson

    IPC: C08L23/06 ,  C08L23/08 ,  H01B3/44 ,  C08K5/01 ,  C08K5/14

    Abstract: The invention relates to a polymer composition comprising polyolefin (a), which is other than low density polyethylene (LDPE), and polyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; a power cable, e.g. of a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.

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